Drop 'source' config key from support charms

Support charms (e.g. rabbitmq-server and mysql-innodb-cluster) source
their packages from distro and never from the cloud archive, this change
drops the set of that configuration key.

Change-Id: I129713bb3845c1d0264bc4e17bb297724d23ac6b

tests/bundles/jammy-yoga.yaml

@@ -42,8 +42,6 @@ applications:
   mysql-innodb-cluster:
     charm: ch:mysql-innodb-cluster
     num_units: 3
-    options:
-      source: *openstack-origin
     to:
       - '0'
       - '1'
@@ -90,8 +88,6 @@ applications:
   rabbitmq-server:
     charm: ch:rabbitmq-server
     num_units: 1
-    options:
-      source: *openstack-origin
     to:
       - '12'
     channel: latest/edge

tests/bundles/jammy-zed.yaml

@@ -42,8 +42,6 @@ applications:
   mysql-innodb-cluster:
     charm: ch:mysql-innodb-cluster
     num_units: 3
-    options:
-      source: *openstack-origin
     to:
       - '0'
       - '1'
@@ -90,8 +88,6 @@ applications:
   rabbitmq-server:
     charm: ch:rabbitmq-server
     num_units: 1
-    options:
-      source: *openstack-origin
     to:
       - '12'
     channel: latest/edge

tests/bundles/kinetic-zed.yaml

@@ -42,8 +42,6 @@ applications:
   mysql-innodb-cluster:
     charm: ch:mysql-innodb-cluster
     num_units: 3
-    options:
-      source: *openstack-origin
     to:
       - '0'
       - '1'
@@ -90,8 +88,6 @@ applications:
   rabbitmq-server:
     charm: ch:rabbitmq-server
     num_units: 1
-    options:
-      source: *openstack-origin
     to:
       - '12'
     channel: latest/edge